They were discussing using a T300 on the non-deluxe version of the wheelstand pro in the big T300 thread recently, basically if your WSP doesn't have mounting holes for a T500 I think you'll have issues. It's worth asking in that thread for safety.
All Thrustmaster wheel rims use a hard wearing rubber, not leather or alcantara. Some people dislike this, others (like me) have no issue with it.
Teething troubles on the T300 included a batch with some tolerance issues with the shaft components, and more recently people getting motor issues, power supply issues. The same kinds of things often seen with a new wheel during the first 6 months of production. From past experience risk of issues goes down after the first months of availability of a new wheel, as the vendor gets production tolerances sorted. Unfortunate, but all niche peripheral vendors seem to have similar problems.